Before planting it is a good idea to find your USDA Zone info to estimate your garden schedule. The most important data that the zone info tells us is average last frost and the lowest expected temperature for your area.

You can figure out when it's possible to plant trachelium in Lake Oswego by reviewing the USDA zone info.

Planting Calendar for Trachelium

Frost tolerance for trachelium:	Not tolerant of frost.
When to plant:	After the last frost.

Since trachelium require warm weather it is necessary to wait until after all chance of frost has passed before you can plant them.

The earliest that you can plant trachelium in Lake Oswego is April. However, you really should wait until May if you don't want to take any chances.

The last month that you can plant trachelium and expect a good harvest is probably August. You probably don't want to wait any later than that or else your trachelium may not have a chance to fully mature. Starting your trachelium indoors is a great way to get them started a couple of weeks earlier.

Last Frost Date

In Lake Oswego the average date of last frost happens on March 15. You should expect an average low temperature of 15°F in the coldest months of winter.

Just be sure to remember that USDA zone info for Lake Oswego is an average and the actual date of last frost can change quite a bit from year to year. Half of the time in Lake Oswego it frosts late in the year after March 15 so be sure to be ready to protect your trachelium if you have one of those late frosts.

USDA Zone Info for Lake Oswego

Here is the info for USDA Zone 8b.

Average Date of Last Frost (spring)	March 15
Average Date of First Frost (fall)	November 15
Lowest Expected Low	15°F
Highest Expected Low	20°F

This means that on a really cold year, the coldest it will get is 15°F. On most years you should be prepared to experience lows near 20°F.

Plants to Grow in Lake Oswego

You may be interested in your other planting guides for Lake Oswego.